For leather straps, I also like to fit deployant clasps. I just hate bending a strap back on itself to extract the tang. It deforms the strap within a couple of wears, while those on a deployant clasp look like new for ages.
I agree about generally preferring the deployant clasp to keep the strap fresher, but I remember when I first spent a lot of money on my first custom strap I read some posts or comments about how to keep a strap in good condition and one of the things it said was not bending the strap towards the buckle but placing your thumb on the buckle and pressing the buckle upward on the strap while taking your index finger and flicking the tongue out of the hole. You still obviously get a little bit of a bend where the hole is, but it keeps the strap from being pulled back on itself every time you buckle it . I have one of my combat straps on a buckle And it's still in fantastic condition because this is the way I remove it.
As much as I like getting custom straps from my really nice watches, the one thing I absolutely won't do is pay hundreds of dollars for the OEM deployant when I can have a perfectly workable $10 brushed buckle that matches the brushing on the case. I do have one strap on a really inexpensive deployant and it works well and keeps the strap fresh.
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